Hey pyro, they are looking great brosephus! I do see the little bit of burn you are referring to. That could be caused by a ph shift. Have you just noticed it as the weather has cooled off? If so, that is probably it and I wouldn't worry about it a bit unless it looks like it is going to keep getting colder. When you say 60's, what 60's? High 60 or low 60. Do you anticipate it to go back up any or will it be getting colder before harvest? Rapid temperature shifts in the soil will affect ph. It isn't a big deal right now but if you are expecting it to continue dropping you may need to start planning for it and begin preparing. Better to be ahead of the game than wait until it is too late. If you expect the temps to raise back up or stay pretty much the same until harvest, I wouldn't worry about it a bit. Other than the slight nute burn your plant looks nice and healthy.